865253 has 2 divisors, whose sum is σ = 865254. Its totient is φ = 865252.

The previous prime is 865247. The next prime is 865259. The reversal of 865253 is 352568.

It is a balanced prime because it is at equal distance from previous prime (865247) and next prime (865259).

It can be written as a sum of positive squares in only one way, i.e., 833569 + 31684 = 913^2 + 178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865253 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432626 + 432627.

It is an arithmetic number, because the mean of its divisors is an integer number (432627).

2⁸⁶⁵²⁵³ is an apocalyptic number.

It is an amenable number.

865253 is a deficient number, since it is larger than the sum of its proper divisors (1).

865253 is an equidigital number, since it uses as much as digits as its factorization.

865253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 865253 is about 930.1897655855. The cubic root of 865253 is about 95.2900828584.

The spelling of 865253 in words is "eight hundred sixty-five thousand, two hundred fifty-three".